why does my iPhone shut down at 60 percent and tell me the battery is dead?

If you make a Genius Bar appointment you can have the battery evaluated. https://locate.apple.com/country

This article also offers some helpful advice: http://www.apple.com/batteries/maximizing-performance/

-AJ

pteaster wrote:

Why does my iPhone shut down and turn off and tell me my battery is dead when my phone percent is 30-60 percent?

There are 3 possibilities:

1. You are in the habit of resetting the date or time, presumably to cheat at a game
2. Your battery gauge needs to be recalibrated
3. Your battery is failing

If #1 isn't the reason, try recalibrating your battery gauge:

• Charge to 100%
• Run the battery down until the phone shuts off
• If it shuts off above 1% charge it for a minute only, then continue running the battery down. Repeat until it makes it to 1% before shutting off
• Charge it to 100% again

If the battery is not defective this should fix it.